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  • Collecting Rocks  - USGS informative article on rocks.
  • Gem Guides Book Company  - Publishes data about rocks, minerals, gemstones, geology, fossils, dinosaurs, gem trails, rock collecting, jewelry crafts, and more.
  • John F. Rakovan – Geology Professor  - Specializes in environmentally significant processes such as crystal growth, metal sorption, trace element partitioning and other surface mediated reactions.
  • Mineral Resources Program  - Features funds for information related to mineral resources in Eatern, Central, and Western America.
  • Minerals of the United States  - Searchable picture gallery of minerals in every state in the U.S.
  • Perlite  - Provides information on the siliceous rock and its various applications.
  • YupRocks  - Source for rock and mineral photography.
 
 
 
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